View Code of Problem 3924

#include<iostream>
#include<vector>
#include<string>
using namespace std;
int main() {
		string str; cin >> str;
		cout << str[0];
		for (int i = 1; i < str.size(); i++)
			if (str[i] != str[i - 1])cout << str[i];
		cout << endl;
}